Cancellation not processed

I sent a Completed cancellation form and copy of my ID to ********** on 28 September. I gave the required 30 days notice and asked for my line to be cancelled on 31 October. I again sent a reminder email with all the documentation on 30 October to remind Telkom of the cancellation on 31 October. I again sent a reminder email on 9 November after I realized the phone was still active. I also contacted the billing department on 9 November to escalate the matter. Yesterday I received an invoice for the period 9 November to 8 December, which I am not willing to pay as I did everything from my side to get the line cancelled at the end of October.

I just want this cancellation to get done and the invoice amount to be credited. I will never again willingly do business with Telkom again.